CONDITIONS AFFECTING STREAM S COURSE 



23 



with the Housatonic 

 in such a way that the 

 downstream direction 

 of the tributary is con- 

 tinued by the upstream 

 direction of the master 

 river. 



CONDITIONS DETERMIN- 

 ING THE STREAM'S 

 CO URSE 



Like the Still river 

 of the vicinity of Win- 

 sted, geological condi- 

 tions have here largely 

 determined the courses 

 of both the Still and 

 the Housatonic. 

 Throughout its course 

 the Still and, above its 

 junction with the Still, 

 the Housatonic have 

 their channels directed 

 in strict conformity to 

 the course of a belt of 

 the Stockbridge lime- 

 stone. On either side 

 of the limestone belt 

 rise dissected uplands 

 of the harder gneisses, 

 schists, and included 

 igneous intrusive 

 rocks. Near the junc- 

 tion of the Still with 

 the Housatonic the 

 contact of the harder 

 and softer formations 

 has been indicated on 

 the map (figure 3), and 

 it will be seen that the 

 streamj unctionis at the 

 contact on the eastern 



ILFORD 



Figure 3.— Map of the (Housatonic) Still River and Vicinity. 



